1232312040 has 96 divisors (see below), whose sum is σ = 4010708520. Its totient is φ = 328149504.

The previous prime is 1232312033. The next prime is 1232312117. The reversal of 1232312040 is 402132321.

It can be written as a sum of positive squares in 4 ways, for example, as 896762916 + 335549124 = 29946^2 + 18318^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305074 + ... + 309086.

Almost surely, 2^1232312040 is an apocalyptic number.

1232312040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1232312040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2005354260).

1232312040 is an abundant number, since it is smaller than the sum of its proper divisors (2778396480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1232312040 is a wasteful number, since it uses less digits than its factorization.

1232312040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4883 (or 4876 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1232312040 is about 35104.3023004304. The cubic root of 1232312040 is about 1072.1121814917.

Adding to 1232312040 its reverse (402132321), we get a palindrome (1634444361).

The spelling of 1232312040 in words is "one billion, two hundred thirty-two million, three hundred twelve thousand, forty".